Which generation is dominant in gametophyte?
In bryophytes (mosses and liverworts), the dominant generation is haploid, so that the gametophyte comprises what we think of as the main plant. The opposite is true for tracheophytes (vascular plants), in which the diploid generation is dominant and the sporophyte comprises the main plant.
Which phase is dominant in lycophytes?
In common with other vascular plants, but in contrast to bryophytes, the gametophyte life cycle stage of living lycophytes is transient and the sporophyte stage is dominant and free living.
Do lycophytes have a dominant sporophyte stage?
Lycophytes follow the pattern of alternation of generations seen in the bryophytes, except that the sporophyte is the major stage of the life cycle.
Are lycophytes sporophyte dependent on gametophyte?
In the lycophytes, as in other vascular plants, there is an alternation of generations between a small, sex-cell-producing phase (gametophyte) and a conspicuous, spore-producing phase (sporophyte). They have terrestrial or subterranean gametophytes that vary in size and shape depending on the genera.
Is the gametophyte generation dominant?
In bryophytes, such as mosses and liverworts, the gametophyte is the dominant life phase, whereas in angiosperms and gymnosperms the sporophyte is dominant. The haploid phase is also dominant among fungi.
What does gametophyte dominant mean?
The character and relative extent of the two phases vary greatly among different groups of plants and algae. Thus, the gametophyte stage is dominant in the more primitive (nonvascular) plants (bryophytes), whereas the sporophyte is the dominant phase in the life cycle of higher (i.e., vascular) plants.
Why are bryophytes gametophyte dominant?
Sporophytes produce haploid spores by meiosis, that grow into gametophytes. Bryophytes are gametophyte dominant, meaning that the more prominent, longer-lived plant is the haploid gametophyte. In liverworts the meristem is absent and the elongation of the sporophyte is caused almost exclusively by cell expansion.
Which generation of the Lycophyte life cycle is dominant gametophyte or sporophyte )?
Bryophytes are the only land plant in which the gametophyte is dominant. In lycophytes, the dominant sporophyte has vascular tissue, and therefore roots, stems, and leaves.
What generation of the plant life cycle undergoes meiosis sporophyte or gametophyte?
Diploid sporophyte cells undergo meiosis to produce haploid spores. Each spore goes through mitotic divisions to yield a multicellular, haploid gametophyte. Mitotic divisions within the gametophyte are required to produce the gametes.
Which is the dominant generation in a lycophyte?
Reproduction of lycophytes As with all plants, lycophytes have two alternating generations. The dominant generation in lycophytes is the sporophyte generation which produces spores for reproduction. Multiple spores are developed in sporangia and dispersed by wind and water.
How are lycophytes different from all other plants?
Unlike the higher plants, however, the lycophytes do not produce seeds. Like all seedless plants, the lycophytes require water for the sperm to swim to the egg.
Is the gametophyte dominant in a gymnosperm?
Are gymnosperms Gametophyte or Sporophyte dominant? Gymnosperms, like all vascular plants, have a sporophyte-dominant life cycle, which means they spend most of their life cycle with diploid cells, while the gametophyte (gamete-bearing phase) is relatively short-lived. Gametophytes, as with all heterosporous plants, develop within the spore wall.
How are club mosses different from other lycophytes?
The most significant difference between club mosses and other lycophytes is that club mosses only have one type of spore. The quillworts are a class of around 150 species of plants and almost all species belong to the genus Isoetes.